Even though you are mainly talking, and announcing whatever comes to you to debate over; it doesn't stop heated words from spilling. So take in all in stride and try to form a question about why such an argument bursts out from something misunderstood. Try to make sure that their anger simmered down, and make a light-humored topic to stay. Compare comedy to the comedy back then, with all the custard pies thrown, and chases, it's a good way to diminish the tense atmosphere.